Plastic Moment of resistance of beam with welded tee at bottom 2

[ajk1]

Does anyone know of software that will calculate the plastic moment of resistance of a steel beam with welded Tee section at the bottom? I started writing a spreadsheet, but is a little laborious to cover all cases because the PNA can fall above the bottom flange of the beam, below the bottom flange of the beam or within the bottom flange of the beam.

 

[ajk1]

Thank you Kootk and BARetired for this extensive discussion. I will print it out and study it further and try to understand it. I take it that if the theoretical cut off point is near the support, there may be insufficient space to make the required extension of the Tee because it will bump into the supporting column. In that case I suppose that the tee would have to be welded to the column.

 

[KootK]

I take it that if the theoretical cut off point is near the support, there may be insufficient space to make the required extension of the Tee because it will bump into the supporting column. In that case I suppose that the tee would have to be welded to the column.

Oh no, in my estimation, this should never be necessary (nor advisable). If you're essentially running the reinforcement full length, I believe that you can just use intermittent VQ/I welds with no need for a true termination weld or tee extension (area under left over VQ/I diagram = zero in KootK speak). I'd just double the last weld length for good measure as BA recommended a ways back.



I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

 

[ajk1]

ok thanks.